Energy-releasing Process for the 2013 May 13 X1.7 Limb Flare: A Continued Study

Abstract In this paper, we reanalyze the X1.7 class limb flare that occurred on 2013 May 13 (SOL2013-05-13T01:56 UT), concentrating energy-releasing process using microwave observations mainly made by Nobeyama and X-ray RHESSI. The analysis was carried out in context of EUV Atmospheric Imaging Assembly board Solar Dynamics Observatory. First, complement initiation showing together with material falling from a large-scale overlying prominence, signature drainage instability. usual downward upward motions sources are observed their evolution. However, source’s height shows recurrent decrease increase during its overall motion; it kind contraction expansion. time period expansion corresponds to post-contraction oscillation loops, oscillatory closely correlated four microwave/hard peaks unusually increased nonthermal emission levels several times. spectra get hardened oscillation. addition, rapid magnetic loops located outside erupting flux rope occurs 5 minutes after onset flare, peripheral is more likely due vortex sink flows generated an rather than coronal implosion. results can provide insight into physics dynamic field particle acceleration solar flares.